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https://issues.apache.org/jira/browse/LUCENE-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910699#action_12910699
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Yonik Seeley edited comment on LUCENE-2649 at 9/17/10 2:01 PM:
---------------------------------------------------------------
bq. Let's try to find some baby-step (even if not clean - we know FieldCache,
somehow, needs to be fixed more generally) for today?
The cheapest option might be:
{code}
public interface Parser extends Serializable {
public boolean recordMissing();
}
{code}
A better option is to replace FieldCache.Parser in SortField to be
FieldCache.EntryCreator.
Oh, and if we're recording all the set bits, it would be really nice to record
both
- the number of values set
- the number of unique values encountered
Both should be zero or non-measurable cost (a counter++ that does not produce a
data dependency can be executed in parallel on a free int execution unit)
was (Author: ysee...@gmail.com):
bq. Let's try to find some baby-step (even if not clean - we know
FieldCache, somehow, needs to be fixed more generally) for today?
The cheapest option might be:
{quote}
public interface Parser extends Serializable {
public boolean recordMissing();
}
{quote}
A better option is to replace FieldCache.Parser in SortField to be
FieldCache.EntryCreator.
Oh, and if we're recording all the set bits, it would be really nice to record
both
- the number of values set
- the number of unique values encountered
Both should be zero or non-measurable cost (a counter++ that does not produce a
data dependency can be executed in parallel on a free int execution unit)
> FieldCache should include a BitSet for matching docs
> ----------------------------------------------------
>
> Key: LUCENE-2649
> URL: https://issues.apache.org/jira/browse/LUCENE-2649
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Ryan McKinley
> Fix For: 4.0
>
> Attachments: LUCENE-2649-FieldCacheWithBitSet.patch,
> LUCENE-2649-FieldCacheWithBitSet.patch, LUCENE-2649-FieldCacheWithBitSet.patch
>
>
> The FieldCache returns an array representing the values for each doc.
> However there is no way to know if the doc actually has a value.
> This should be changed to return an object representing the values *and* a
> BitSet for all valid docs.
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